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Gravity - converters

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Gravity - MCP23017 I2C expander - 16 I/O - DFRobot DFR0626

The MCP23017 output expander allows you to expand the system with an additional 16 I/O ports via the I2C interface. It has a Gravity connector and standard goldpins. I2C...
Index: DFR-16601
Index: DFR-16601
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Regular price €4.84 Price €4.84

DFRobot Gravity: digital I2C multiplexer - 8-channel

Module with multiplexer that allows you to connect 8 different digital I2C buses to one interface, for each, there are separate pins SDA (bus of data line) and SCL (clock line...
Index: DFR-12628
Index: DFR-12628
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Regular price €6.73 Price €6.73

DFRobot Gravity - MCP4725 D / A converter 12-bit I2C

Module with 12-bit analog-to-digital MCP4725 converter with EEPROM memory. It can precisely convert the digital signal into corresponding analog voltage signal. The analog...
Index: DFR-12049
Index: DFR-12049
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Regular price €5.06 Price €5.06

DFRobot Gravity - RTC SD2405 I2C - real time clock module

Module with real time clock SD2405 has a dual power supply system, when there is a lack of the main power supply, the module automatically switches to battery power.
Index: DFR-09380
Index: DFR-09380
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Regular price €8.78 Price €8.78

DFRobot Audio Analyzer

The module is equipped with an equalizer MSGEQ7. It a llows you to add audio detection for Arduino sound. It has 7 frequency bands: 63 Hz, 160 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.25...
Index: DFR-07443
Index: DFR-07443
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Regular price €18.88 Price €15.10
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DFRobot Gravity: module with EEPROM memory - I2C - 256kB

Module EEPROM from series Gravity, allows for memory expansion on the data with 256 KB in Arduino. Communication via the I2S interface. It saves data during a power outage. The...
Index: DFR-13242
Index: DFR-13242
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Regular price €6.53 Price €6.53

DFRobot Gravity - adapter for the GP2Y1010AU0F dust sensor

Adapter for the direct connection of the sensor GP2Y1010AU0F using the Gravity interface for Arduino without additional modules and the prototype board.
Index: DFR-11282
Index: DFR-11282
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Regular price €3.94 Price €3.94

DFRobot Gravity converter prądowo current-voltage 0-25/0,3V

Module from the Gravity series enables the processing of the current signal from 0 mA to 25 mA into a voltage signal from 0 V to 3V. The sensor may be connected to the...
Index: DFR-12471
Index: DFR-12471
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Regular price €4.93 Price €4.93

DFRobot Gravity - analog signal isolator

The module prevents the operation interference of the sensors through the insulation of the analog signal and providing an isolated power for sensors. It is supplied with the...
Index: DFR-09529
Index: DFR-09529
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Regular price €19.78 Price €19.78

DFRobot Gravity: digital signal isolator IB05_XT-W75R3 I2C

Digital isolator of signal I2C ffrom series Gravity. It protects the sensors from electrical interferences causing a read error through the isolation of I2C signal and...
Index: DFR-12627
Index: DFR-12627
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Regular price €16.63 Price €16.63

Gravity - I2C - 2x UART converter - DFRobot DFR0627

A module that allows to derive two UART interfaces from the I2C interface. The maximum transmission speed is 1 Mb/s , each UART interface has an independent FIFO buffer...
Index: DFR-17311
Index: DFR-17311
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Regular price €7.99 Price €7.99

Gravity: ADC converter ADS1115 16-bit - 4-channel

Module made by the Gravity features a 16-bit analog-to-digital converter ADS1115.
Index: DFR-12472
Index: DFR-12472
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Regular price €10.10 Price €10.10

Gravity - I2C hub splitter - 8 ports - DFRobot DFR0759

I2C hub splitter allows to connect several modules and peripherals to one I2C connector. Thanks to DFR0759 hub you have possibility to connect up to 8 Gravity series...
Index: DFR-19018
Index: DFR-19018
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Regular price €1.46 Price €1.46

Signal isolators - safe transmission free from interference

Due to its simple implementation, the I2C bus is one of the most popular solutions for communication methods in digital electronic devices. For data transmission, the I2C bus uses two lines, i.e. the clock line (SCL) and the data line (SDA). The speed of data transfer over the I2C interface, can be done in four speed modes, i.e. 0kb/s to 100kb/s or 400kb/s or 1.0Mb/s or 3.4Mb/s, with I2C most commonly used to transfer data at speeds up to 100kb/s and 400kb/s. Communication over the I2C bus is in both directions. In order to protect the data transmission from interference, it is advisable to add opto-isolation to the communication path. In contrast to I2C communication components, which operate in bidirectional mode (half-duplex), signal isolators implement unidirectional transmission. Nevertheless, such devices can be connected together very easily. The signal isolator module from DFRobot perfectly fulfils this task. Such an isolator splits the signals transmitted in both directions of the I2C bus into two separate unidirectional signals with negligibly small propagation time. Moreover, we have secured safe isolation from the mass of cooperating devices and protection against dangerous overvoltages.

I2C multiplexers - instant switching between I/O ports

After finishing the project on Arduino, we can start assembling the hardware. Contrary to what you may think, the end result may turn out to be a bit problematic. When you connect at least two sensors that communicate over I2C to the Arduino pinouts, it may turn out that they have a permanently assigned I2C address. In that case, the sensors will not be able to work properly. The solution to this problem, is to use a digital multiplexer module. The Gravity series multiplexer module from DFRobot uses a specialized TCA9548A chip, which allows switching between eight signals transmitted over the I2C interface using a single main data bus. Simply connect sensors or other I2C bus compatible devices to the multiplexed clock and data line buses. If a signal conflict is detected on the multiplexer pinouts, simply apply a low state to the RST pin.

DAC converters - a successful transition from the digital to the analog world

In electronics we can distinguish devices by the type of time signals, i.e. analog and digital. In many cases it is necessary to change analog signal into digital form and also in the other way round. For example, if we want to listen to our favorite music that is stored on digital media, then we will need a digital-to-analog converter (DAC). The DAC module from DFRobot, based on the MCP4725 chip, provides 12-bit resolution of the output signal (approx. 1.2mV for 5.0V amplitude and approx. 0.8mV for 3.3V amplitude), making it ideal for music playback systems, test signal generators, and music synthesizer projects.